Electromyographical analysis of selected lower extremity muscles during 5 unilateral weight-bearing exercises
Electromyographical analysis of selected lower extremity muscles during 5 unilateral weight-bearing exercises
复制标题
DOI：
10.2519/jospt.2007.2354
复制
发表时间：
2007-02-01
影响因子：
6.1
通讯作者：
Greenway, Elizabeth H.
中科院分区：
文献类型：
--
作者：
Ayotte, Norman W.;Stetts, Deborah M.;Greenway, Elizabeth H.
研究设计：前瞻性单组重复测量设计。实验：在5次单侧负重运动中，量化臀大肌、臀中肌、股内侧斜肌和股二头肌的肌电信号幅度。背景：使用标准化EMG（NEMG）信号幅度作为肌肉激活的量度，并因此作为运动强度的估计，可以检查单侧负重锻炼期间臀部和大腿肌肉的相对贡献和相互作用。关于增强的潜在效率，在常用的练习中，这4块肌肉的EMG信号幅度的数据是有限的。方法和测量：23名健康的无症状受试者（16名男性，7名女性;平均+/- SD年龄，31.2 +/- 5.8岁）参与。使用一般线性模型进行重复测量分析。在2次单独试验的5次锻炼期间，测量每个受试者4块肌肉的最大自主等长收缩百分比。结果：统计学显着差异，注意到在数量上的平均NEMG信号幅度的4块肌肉在5个演习。在所有的exercises.CONCLUSION：即使所有的肌肉，除了股二头肌表现出平均NEMG信号振幅足以加强，壁蹲产生的激活水平最高，应该被认为是最有效的针对任何4块肌肉或训练肌肉之间的合作努力。
STUDY DESIGN: Prospective single-group repeated - measures design.OBJECTIVES: To quantify electromyographic signal amplitude of the gluteus maximus, medius, vastus medialis oblique, and biceps femoris during 5 unilateral weight-bearing exercises.BACKGROUND: Using normalized EMG (NEMG) signal amplitude as a measure of muscle activation and, therefore, an estimate of exercise intensity, the relative contributions and interaction of the hip and thigh muscles during unilateral weight-bearing exercise can be examined, With regard to potential efficiency for strengthening, data on the amount of EMG signal amplitude for these 4 muscles during commonly used exercises are limited.METHODS AND MEASURES: Twenty-three healthy, asymptomatic subjects (16 men, 7 women; mean +/- SD age, 31.2 +/- 5.8 years) participated. A repeated-measures analysis was conducted using general linear models. The percent maximum voluntary isometric contraction was measured within each subject across 4 muscles during 5 exercises for 2 separate trials. Effect sizes of pairwise comparisons were computed.RESULTS: Statistically significant differences were noted in the amount of mean NEMG signal amplitude for the 4 muscles across the 5 exercises. A similar recruitment pattern between muscles was observed across all exercises.CONCLUSION: Even though all muscles except the biceps femoris demonstrated mean NEMG signal amplitudes sufficient for strengthening, the wall squat produced the highest levels of activation and should be considered the most efficient for targeting any of the 4 muscles or for training a cooperative effort among the muscles.